While New York City subway riders pondered what they would do in a similar nightmare situation, authorities charged a homeless man in the death of a Queens resident pushed in front of an oncoming subway train and killed as onlookers watched.

The photographer under fire for taking pictures of a man who was pushed off a New York subway platform and hit by a train said Wednesday that he did all he could to save the man and that he has sold the rights to the photos.

Investigators were looking for a man who witnesses said was mumbling to himself on a subway platform before and after he pushed another man down onto the tracks in front of an oncoming train Monday afternoon, resulting in that man's death, police said.